Properties is configuration environment in which we change the default setting of system environment but in our programming environment Properties is members of classes, structures, and interfaces which are used in programming to interact with any system Properties file and record which are help in to increase the reliability of the web development. Properties are an extension of fields and are accessed using the same syntax. They use accessors which the values of the private fields can be read, written or manipulated. We cannot directly access these fields from outside the class scope but we can have Properties for accessing these private fields.